Performance tests are broken after changing default network provider

[Alexander Kislitsky]

https://ci.fuel-infra.org/job/nailgun_performance_tests/369/console

One of errors:

self = <webtest.app.TestApp object at 0x8002a50>, status = None
res = <400 Bad Request text/html body='{"message... []}'/76>

    def _check_status(self, status, res):
        if status == '*':
            return
        res_status = res.status
        if (isinstance(status, string_types) and '*' in status):
            if re.match(fnmatch.translate(status), res_status, re.I):
                return
        if isinstance(status, (list, tuple)):
            if res.status_int not in status:
                raise AppError(
                    "Bad response: %s (not one of %s for %s)\n%s",
                    res_status, ', '.join(map(str, status)),
                    res.request.url, res)
            return
        if status is None:
            if res.status_int >= 200 and res.status_int < 400:
                return
            raise AppError(
                "Bad response: %s (not 200 OK or 3xx redirect for %s)\n%s",
                res_status, res.request.url,
> res)
E AppError: Bad response: 400 Bad Request (not 200 OK or 3xx redirect for http://localhost/api/clusters/6/network_configuration/nova_network/)
E '{"message": "Wrong net provider - environment uses \'neutron\'", "errors": []}'

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/239899

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/239899
Committed: https://git.openstack.org/cgit/openstack/fuel-web/commit/?id=7c4e7cc585f5c8cbd8d59d079b916a621893fd96
Submitter: Jenkins
Branch: master

commit 7c4e7cc585f5c8cbd8d59d079b916a621893fd96
Author: Alexander Kislitsky <email address hidden>
Date: Wed Oct 28 13:36:13 2015 +0300

    Network provider fixed in performance tests

    Restriction for nodegroup name was introduced into DB.
    Performance test for adding nodegroup fixed.

    Change-Id: Id1ed98ea3f718ba693df4ed52c012158dc0feff3
    Closes-Bug: #1508897